[CP2K-user] The units of atomic coordinates when defining the external potential function?

[Nam Tran]

Dear CP2k users and experts,

I am trying to use the external potential (CP2K_INPUT / FORCE_EVAL / 
EXTERNAL_POTENTIAL) to restraint the movement of some atoms (the input 
function an exponential function). I would like to know the unit of 
the atomic coordinates (X,Y,Z) using to define the external potential 
function. 

Best regards
Nam
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